\documentclass{article}
\usepackage{verbatim}
\usepackage{pgfplots}

\pgfplotsset{width=\textwidth, compat=1.5.1}

\begin{document}



\begin{tikzpicture}
  \begin{axis}[title=Perimetric complexity vs. density, legend pos=south east, xlabel=Complexity, ylabel=Density]
  \addplot[
      scatter/classes={
      hebrew={red},
      burmese={green},
      thai={blue},
      roman={cyan},
      greek={magenta},
      hiragana={yellow},
      katakana={black},
      georgian={gray},
      armenian={lime},
      cyrillic={olive},
      kanji={orange}
    },
    scatter,only marks,mark=x,
    scatter src=explicit symbolic,
    title={Complexity vs Density},
    xlabel=Complexity,
    ylabel=Density]
    table[x=complexity, y=density, meta=alphabet] {data.table};
    \legend{Hebrew, Burmese, Thai, Roman, Greek, Hiragana, Katakana, Georgian, Armenian, Cyrillic, Kanji}
  \end{axis}
\end{tikzpicture}

\begin{tikzpicture}
  \begin{axis}[title=Gradient Orientation bin 2 vs. Gradient Orientation bin 5, legend pos=south east, xlabel=GO 2, ylabel=GO 5]
  \addplot[
      scatter/classes={
      hebrew={red},
      burmese={green},
      thai={blue},
      roman={cyan},
      greek={magenta},
      hiragana={yellow},
      katakana={black},
      georgian={gray},
      armenian={lime},
      cyrillic={olive},
      kanji={orange}
    },
    scatter,only marks,mark=x,
    scatter src=explicit symbolic,
    title={Complexity vs Density},
    xlabel=Complexity,
    ylabel=Density]
    table[x=gradOrientation2, y=gradOrientation5, meta=alphabet] {go2vsgo5.table};
    \legend{Hebrew, Burmese, Thai, Roman, Greek, Hiragana, Katakana, Georgian, Armenian, Cyrillic, Kanji}
  \end{axis}
\end{tikzpicture}

\end{document}
